Influence of alkali-treatment temperature on the one-dimensional structure of nanosized TiO2 |
| |
Authors: | Thuy-Duong Nguyen-Phan Myoung Bok Song Eui Jung Kim Eun Woo Shin |
| |
Institution: | 1. School of Chemical Engineering and Bioengineering, University of Ulsan, Ulsan, 680-749, South Korea
|
| |
Abstract: | One-dimensional titania nanomaterials were synthesized by soft chemical processes in an alkali medium. The effect of alkali-treatment temperature on the morphology, porosity, and crystalline phase of TiO2 nanomaterials was investigated. Nanotubes having an opening end were observed when aging the sample at 130 °C, while conducting the process at 180 °C resulted in nanoribbons with a high aspect ratio. Post-treatment at 300 °C led to the partial transformation from tubular structures into nanoparticles or ribbons into nanobelts. While the monoclinic sodium hexatitanate and anatase crystal had a tubular structure, nanoribbons and nanobelt TiO2 also showed the presence of hydrogen titanate and sodium trititanate. High surface areas were achieved in as-prepared nanotubes and nanoribbons, 456.5 and 72.1 m2/g, respectively, and a drastic reduction was obtained upon post-treatment at 300 °C to 72.1 and 19.2 m2/g, respectively. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|